I like Part IV !
This is a really gorgeous cartoon! It's just great how serious everything is. It never got funny or anything for a moment. It's probably the most serious Mario cartoon (series) I've ever seen! What's even more amazing is how you used these old graphics. These are the least story based games of them all!
You made the emotions so strong. The battle scenes were great. It dragged on a little, but still fantastic. I also love how Mario wasn't in this and you gave the other characters some screen time. It was cool to see the Mushroom people shrink down like Mario.
This is so unrealistic, everyone knows you can't go left in a Mario game!
The toads are kicking ass
good animation :)